Tooru is just obnoxious loud liability that Aoba Jobsai who they always Tunned out to even when he is serious about to talk about zombies. oikawa just spamming zombies nonstop for weeks when the birds are gone and the air taste like blood and metalic, but no one cares as they don't even listen to him as he is an obnoxious loud liability who does not even know what he is doing anyway as he does not have your notes on how to survive, you know how to survive while he doesn’t. Y/n knows that the Silence is the real warning, the second warning is the smell and the third is the power grid failing. They are still on the silence and smell phase so they have a lot of time before the power grid feeling that’s when the zombies will come. The rule might be don’t panic and be calm in the zombie apocalypse but y/n knew better as y/n know that real Rule is that silent is survival & noise is death as zombies are sound driven.